Pulse encoding for ZTE imaging: RF excitation without dead-time penalty.

ABSTRACT:

Purpose

To overcome limitations in the duration of RF excitation in zero-TE (ZTE) MRI by exploiting intrinsic encoding properties of RF pulses to retrieve data missed during the dead time caused by the pulse.

Methods

An enhanced ZTE signal model was developed using multiple RF pulses, which enables accessing information hidden in the pulse-induced dead time via encoding intrinsically applied by the RF pulses. Such ZTE with pulse encoding was implemented by acquisition of two ZTE data sets using excitation with similar frequency-swept pulses differing only by a small off-resonance in their center frequency. In this way, the minimum scan time is doubled but each acquisition contributes equally to the SNR, as with ordinary averaging. The method was demonstrated on long-T_2<

SUBMITTER: Froidevaux R 

PROVIDER: S-EPMC9299067 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature